"No Such Thing" is the debut single of John Mayer. It was released in April 2002 as the lead single from his first album Room for Squares. Like many of the songs from Mayer's early musical career, the song was co-written with Clay Cook. The song has been used in episode 15 of the first season of Alias. It was Mayer's breakthrough hit, peaking at number 13 on the Billboard Hot 100, and becoming his highest-charting song until "Say" hit number 12 in 2007.